{
  "manageEntity": {
    "action": "Save",
    "entityId": "2096320460",
    "entityType": "Track",
    "nonce": "0x3fa3d0a049bc396bc334dbcc770204a908b221d6d77a3350c4ca2e75fb266233",
    "signature": "0x66d607b9d18d70707168458a0fc4bc68fc64c03623e8afee1a3efc5ff3c8a2626b5250e811e4b05b337049857bff6d3e9d7298619f84784afeb0e30b0c8379c71c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}