{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146190041",
    "entityType": "Track",
    "nonce": "0x7cebe385d2a8e62de102b21fece1a7c2b6755ff314b57ae46243b9bde314214d",
    "signature": "0x4d92c2f65a7ebeaae9510ac9bf3562f5ee057985adfa47fb642239eaaba1c3aa4f8ee5a615e471c97b890db3e4e6155ba86c8e9160aafee0d1d1fc6b2bc670551c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}