{
  "manageEntity": {
    "action": "Save",
    "entityId": "748932302",
    "entityType": "Track",
    "nonce": "0x59764d549b10d58638b8c1b2e1485100257e80bfe4115df4bca8074f5d9ab59c",
    "signature": "0x1f56827adf52ed5a512c50d4ba5e0d7b7e945232b9f8b2da6234963fa4c4821275c6829f28eddcd8a092a6fc8d21b8791a707304c1a26cbe3556f05b8d9146f31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}