{
  "manageEntity": {
    "action": "Save",
    "entityId": "638475792",
    "entityType": "Track",
    "nonce": "0xe42e776973e53d116ff276ac23d62a20785c8f525e8aa51fceadea33f3dfd98b",
    "signature": "0x3ade8ce1d09a7b3c39689a966f12c6b5fa3e7a00dd533cbcaf3f743ae40da8a3296de6172c3452e1ba0a07e1832fbe33a0bd8b3c5b1f20381313939dc550ee021b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}