{
  "manageEntity": {
    "action": "Save",
    "entityId": "588521033",
    "entityType": "Track",
    "nonce": "0x9efff14a9f7e77a31702fbea85455261480178548b4a5bc3ac0f5352b4ace723",
    "signature": "0x229d3e723b580dd7bce29df36e6627e890292abdea6a6c4e8eb100934251c5136dd4eb33df92319ca09fe578989dc8295f45ebae4ca910d89760ed6518448bd11c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}