{
  "manageEntity": {
    "action": "Save",
    "entityId": "502189486",
    "entityType": "Track",
    "nonce": "0x26dcacb345ff1f7320487299dea5192f68e654653a6d5dc10bd96799cfd1ccc8",
    "signature": "0x89ec4bfda7e8c99fbdd8f76d672cf4ce24f4748f31b8f76078bec965b8443ecc0c377c3667a070381c39fe0cd8b00a71a258e46639450529eb856149845cb01e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}