{
  "manageEntity": {
    "action": "Save",
    "entityId": "1365929203",
    "entityType": "Track",
    "nonce": "0xf09dbe59b24f0f73b602b45ac540d8c616fd018136fd35a48072941ccb3c59ed",
    "signature": "0x9d579c631765e1dca69e65c0b10cb3786dd1174edf4143d7b818d50d143d203e32a09342d9f4a44c11cea907db3e655b895ea68a17389115d0f6e3c235986cc21b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}