{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124392221",
    "entityType": "Track",
    "nonce": "0x563072d5963aee906a5fc5fa8aa55c93210a154c8e05c9c3fca695674005c622",
    "signature": "0xdc9ec0bf77fe29bb2f1a28cd76b2fa5c05d07d478abd250ddbce7ce9def5937f18ea79935cf0bb83a7ef001ea9dd75a01f572b43465f79d16de368ab9e9e92711c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}