{
  "manageEntity": {
    "action": "Save",
    "entityId": "2105606645",
    "entityType": "Track",
    "nonce": "0x9f872ecbbd54829c5365cff83fa5c43ae546328ba34a1b7443c0a9b29832f75a",
    "signature": "0xfe8113b97d2ec088d69d18d7b74131efbd04149b3c21d5859f291ebc14c2c83b0ac59e638c94bdbb7065a325ce30521233d021226eb8cf1b1a4551e4cf3b4f9d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}