{
  "manageEntity": {
    "action": "Save",
    "entityId": "185274",
    "entityType": "Track",
    "nonce": "0x29dd2f737f9f579f4e79c74dc03de7d9cef656bf3b4c3833d8881bd1e66e89cd",
    "signature": "0xd295b75f2c5de9be61efd25f6e658dbb4f866fdcbb1c0a8c87f81f2f374e29c47443a6e07c3edb1499f6f14fa475c59f9f43d274e5624deaede07569dbd0b5d51b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}