{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090592885",
    "entityType": "Track",
    "nonce": "0x273bb977f0556544a4d3c9edd77419b752d842194c1067a36c8bc6675599310d",
    "signature": "0x0275e1071a3000986eb0e2c68801d0e97f80c6f9e44f0b665752600fe6f09d71059bda72d887fa293b80797e5ce9a52fd191c669d605f19788265839f4d1bd961c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}