{
  "manageEntity": {
    "action": "Save",
    "entityId": "277506965",
    "entityType": "Track",
    "nonce": "0x52519c709b2690ac7602aa40bbde11f41adefc61c79e03e563ef9133e7bce621",
    "signature": "0xd6066dd839b4ed1b7a4d54da125bf99b27e2f05058a6519c63b7ca8ada724ed644c21625fa4a2b8dc7f672cf06f26981ea8717f991c79d605f726da1933a2b6e1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}