{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230299291",
    "entityType": "Track",
    "nonce": "0xfda838ca179118b1958749bbc1c96b5e89440008de6d08be905cbdcd19ebe02e",
    "signature": "0xfcc4e659ee24aa29f274b8fc71dc5505e28b6873730c180c87c107a94c9c3eb537fe121756676e0f32853d8a24c4cf7c15a8276d851002749ccdfa8b63bd3b101b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}