{
  "manageEntity": {
    "action": "Save",
    "entityId": "1231538181",
    "entityType": "Track",
    "nonce": "0xb53df55b5bc2578e3d7d1493762ba9e067877c36e92985387f02e65ec018e994",
    "signature": "0x7d440d455e6a5b2863cb10db2bc4f9d89170bef758261e1d5c2746ffd7a3c8cc629e45e7da2a1c7587b9e7be24f25715fe99becf7737b91f29b0783f3b3fd0751c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}