{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042691295",
    "entityType": "Track",
    "nonce": "0x64e50a6bdfb465c19555f210fb6d3678c3f826590560538ed98f6c6880e40e83",
    "signature": "0x22e5190ed04833342f27732efbde8eadbf77db543d54bc575340787d60f6ea0348e0b1b6a89f0bbe2055f3e0ebfa030f2239586dbff7e8b0e8973c38420d7acd1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}