{
  "manageEntity": {
    "action": "Save",
    "entityId": "889630998",
    "entityType": "Track",
    "nonce": "0x8b8639b1cf2f72cb20dfd112083ff456cabcb0dd46dc8dcfb2ae851112045d57",
    "signature": "0xdf26a1d17500d401a9a7b90673d7eebb0c90f0c3cd38caaa592ea6723821a37b40a075e647851f942c411c597ba774e4ba32698d3d83795b48b3d43e4cfa936f1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}