{
  "manageEntity": {
    "action": "Save",
    "entityId": "662800704",
    "entityType": "Track",
    "nonce": "0xba8254f9cd5457eee5278fc1b32a673c6fe55269260c0bca1bdef692bf8449a5",
    "signature": "0x69e1bbe4dac1eadb0674a857b6e9a61fff2bb00bd5edc3776fbe70c0dd4c0eb616ede6b1625d67df982e90d37f7335b6c91c36b90c472f6b222de1f8aa5ccfd11b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}