{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089163512",
    "entityType": "Track",
    "nonce": "0x7671537ad5eaf08d96113e37154e69d8a63d36e993950fd329a96a25a149ff5c",
    "signature": "0x678cad31769b7394f56f9f7445c7ba05681605f42a1d7061288fff2a6e33a6b9791023564daa8db634e3c2b3c524f014cf6aa3b9dcc5032962580beae6b6562b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}