{
  "manageEntity": {
    "action": "Save",
    "entityId": "1730749285",
    "entityType": "Track",
    "nonce": "0x63a32782191282fb40650b3ea03a70a03a1988d80dd5b4a93ecb02a92ce5b23b",
    "signature": "0xd62acc0fc3d0789da5b7b6169838acaf20fd9b7a7e5fe584bd739672d7e92c0738c75679842cde63b56214a75bb756554188d051dc0addde2ccf0bfe972929761b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}