{
  "manageEntity": {
    "action": "Save",
    "entityId": "2127789666",
    "entityType": "Track",
    "nonce": "0xee51a179e7071a0b8cf9a3da5d74ccc29d222f6eb16ef67d48a406ed41e1d9ba",
    "signature": "0xe28d76f6de88dc36f2e59afbb57d9f31546a5d3d56ff13b5aca4305c9baf142842de28688cdd0a8a97aa8ccef537ae31caa168c64cd06d53a2e2012ca17766b21c",
    "signer": "0xcBFBf860488b647E167A7020ac01A0A0c34Bf981",
    "userId": "4601100"
  }
}