{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445806907",
    "entityType": "Track",
    "nonce": "0x6c6d7f8855af9bf79292a457504343a0b79df1eb379d4e026ee80c53e2bf9606",
    "signature": "0xe69b61e6ed1661e7bb8b2c45170018b5c37ffbd0452d67147b51ee571ebed0895a658f2b05785a13bd4d132a8b525432879c925673f6eaaf3b8c83a500609b741b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}