{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304671992",
    "entityType": "Track",
    "nonce": "0x95eed39b65b3400719ce3f2239c38cd204f59ca575578cfccacf81cd844c230a",
    "signature": "0xb8142901dbd53b2dcf6917f90a4ada2be92059e38200a1c105c6503fe3970fb81be70e9834ea2354f34e54fe9a95a5eac6ba83aac3dd082e5711fd67ed72eafc1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}