{
  "manageEntity": {
    "action": "Save",
    "entityId": "1206355412",
    "entityType": "Track",
    "nonce": "0x2f297cecdf1cae1fd7da3f9099336916cfde4662184aeb23a9a71b663ded6a64",
    "signature": "0x6fda8336b9980d6346fb7e58396f6d4b5fc6e805a22844d314588b88e7f1b164554ef5e8af0fffdca731e14ed12c0f668bbfa5b28350a758a1de5d57c9bbc82e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}