{
  "manageEntity": {
    "action": "Save",
    "entityId": "1921540382",
    "entityType": "Track",
    "nonce": "0x38666094e710c0bd898586cc37a19bbf850e3943146b1c33673eda37d479a1b7",
    "signature": "0x46e9a7087a1243ad2d8d3fb47bc439a7bb850b8d2bfb61c74025d9f389c1c6d7656cdfd0c40e8a3bebd240e1f88ac80fb6b0d45b66d21f185d5e450cba1fffcd1b",
    "signer": "0x22AC4e184Dc6B3f1F286b53b22E2D65931EcfEa8",
    "userId": "851552461"
  }
}