{
  "manageEntity": {
    "action": "Save",
    "entityId": "117289164",
    "entityType": "Track",
    "nonce": "0x49eeb1287fd652b3397ef8218181418a36e90a800945caae1092854263617507",
    "signature": "0xca0334f912d499f273c079d59f8c9bde2745856ea3bfb41df5a9a87246f8aa6a470ab39624960db5a12071d6e88940c3db0116e407ec7a2f46301abebcbf4c8f1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}