{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935519377",
    "entityType": "Track",
    "nonce": "0x7c262409d0adf0a59c79cbd74ca828100bae74106d846180032a76d3552305ae",
    "signature": "0xbcbfe34996b0ff574aa1454f2652ae2ee753362863df6183c306439963284aba0a0a9fbf7b33628b47b4861d1673bc4b1564c60f20f4a426cd9945789530e8d21c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}