{
  "manageEntity": {
    "action": "Save",
    "entityId": "830900014",
    "entityType": "Track",
    "nonce": "0xe7d2ecc7de93730d24770700c65eb344c1c8bb5de1f31f1e3ea8e9101151894b",
    "signature": "0xafb5697f45d82ef8849e261bd1d942d42049b0b970aa5458f5e4dc53c3db33cc19cfa8cfc0775ed07f3598b67a447168522d42f6c857e18ad473fc3e96a8a9131b",
    "signer": "0x6CcE7F9E10C034E964116788c9a1CCB15d852481",
    "userId": "44964220"
  }
}