{
  "manageEntity": {
    "action": "Save",
    "entityId": "790567852",
    "entityType": "Track",
    "nonce": "0xc171cc8bba4d52724753a8dc1ec8d38dd9e9af28f0dd923b0ed1960db960e822",
    "signature": "0x9ba6621a178b9bc59e689847f8b12c0a5225adb8b766280f093dec2d1d41a48a40ab271cbb51f62b5753ec27f0045ca2c446644d743f2b121cc0e687e547f9d01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}