{
  "manageEntity": {
    "action": "Save",
    "entityId": "1319799161",
    "entityType": "Track",
    "nonce": "0x0f90f176c9be6ca85a95d2cd134417e6cc210458d0966da1c2b25e15f967060c",
    "signature": "0xee3ddb24d6b5ede11bdbde0a1dd037c473069afa6fa3a523fd2a1b87ad36461839923569ca4c614318ac0bbc21a140944794c60275bf2fec1c0ef1541633abe11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}