{
  "manageEntity": {
    "action": "Save",
    "entityId": "485483348",
    "entityType": "Track",
    "nonce": "0x8d7f08a1ee08251bd3ce2ce5e73caa716e04f4872c9802b66cba0a983b984f28",
    "signature": "0x633738ae5d25d283e6e1403c055ddd9ac2e22b0bd2a3aaab683a3fe126289d771f500e70ff453c0f23fd1c2b82f2e738cc93ca625311d0564f362359fe3f7d1b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}