{
  "manageEntity": {
    "action": "Save",
    "entityId": "1634155164",
    "entityType": "Track",
    "nonce": "0x203af7fef60dc64cdd2e01490ff7c60237f23a076b43df9e7cc4b445936a4b32",
    "signature": "0x24f325611757d54ceadc62dc68d75c21f0ee7aaab4bd91f577d79c99780598344fd147f287a05738d25b1db1c48a604bfd03113096348ec2af9379683fb902ad1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}