{
  "manageEntity": {
    "action": "Save",
    "entityId": "970770555",
    "entityType": "Track",
    "nonce": "0x45f3fbda527a3032c4257880f136efcd3d865d83790416dd011348861d7c857a",
    "signature": "0xec8a0cf5725ea711330e472a3da474e6145c49e4552a802ac602836e341e030c581946b600fa1963e7b714a2dc0233d97cc1076530c9989bfc6bc184f18399061c",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}