{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666546636",
    "entityType": "Track",
    "nonce": "0xa69e5c4d168e2eae061f1c0d80ea3f4d906a1e53a9dd9d558041a8d54de9155e",
    "signature": "0x6bea169a90a63c5cc6bc03a0497033e73048025d32ef647046295d546e70d62161bb1265af339fdc8c8655997cb3b886d6a3d9788d16e0db4dac282365018abf1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}