{
  "manageEntity": {
    "action": "Save",
    "entityId": "903142494",
    "entityType": "Track",
    "nonce": "0x312511d93ef8c8dda1adb2b63f179b88b04f87f92e55b87ece53b6863a0d3f65",
    "signature": "0x14c2ef5606d4e8770dc5ec0a75c60d47d638c63635b21009fab7fbf007a92ecf31cc7a72e17b2dcd9229e62eab61b55107fa46b602db9f100737ffb6fee3cc041b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}