{
  "manageEntity": {
    "action": "Save",
    "entityId": "1087018412",
    "entityType": "Track",
    "nonce": "0xe1063561e6dbadd1deb62cca6e925eb8b42bac06b19fb31dceffc65341519e34",
    "signature": "0xe97d80663af071ad7576cb97308e06eca4c6da1257420f979f5fc0905e0d4477121cdf38fb9ed6b25263378fe06a1321d50133a4918051c6e72529af4b143d181c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}