{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175636852",
    "entityType": "Track",
    "nonce": "0x0fd8c6f392c1f1d10ef6270ab3dd5a85cb365a3c5818583c6ff698767146c392",
    "signature": "0x17f06cfb177c4b5861e8048b201832d398a69d961428a56ffa5fc90df56e285252b5609b1be4e78187c1b8f428ffa8d324d5c06564f463af69e637b8294d89f31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}