{
  "manageEntity": {
    "action": "Save",
    "entityId": "399104486",
    "entityType": "Track",
    "nonce": "0x99ffa4885d91ccc9155eb8ae4e7290df34767ee9dc18c3e63bcff4449d1db3ff",
    "signature": "0xf74aaf9eca0f710d0a1649a5cc9dfca1bdb9d9cc331e5c138e3cb7fccd11cac55047d0a005ce38e9eb8d62305b23546b0660e734fab06ce554ba16fa4834dbda1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}