{
  "manageEntity": {
    "action": "Save",
    "entityId": "378211006",
    "entityType": "Track",
    "nonce": "0xeb72b4ea9f45eac6fbdeb28622d983134f8ef7932e831ad0503f1900cd2ac63e",
    "signature": "0xbae7d8ad8280eb8f49380d187ef6db9759f326091890c0939348b849957dbe9b41408d6fee23034715412bf82f7b3d09ac815fdf1e6259018a63c36ac1ddecfe1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}