{
  "manageEntity": {
    "action": "Save",
    "entityId": "936366238",
    "entityType": "Track",
    "nonce": "0x1745e266071989e9a600b1621e28425eef5ad701e79361a4d1c1a7718f9ab4dc",
    "signature": "0x34671222c02ca19d34fdef7ad319b30b34704765effc25c3df0610e3b39ba59c16a9c08e2be0af791b76496db4668c1a3f46e680cdb371b5d0525bbe1cdbac4e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}