{
  "manageEntity": {
    "action": "Save",
    "entityId": "318571",
    "entityType": "Track",
    "nonce": "0x66ee364458abaafda8f2b29e46a1eb1105b93d137d5cb998ccab24bf328dbcee",
    "signature": "0x59c3b91d6558c4cb7005958e398db08f3b755743b1b263b8d8e4d88ce4ac19db5a30e54258aa058903482bffd2e08e0823eb52731e6c9dfbcfd8c6905da33d881c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}