{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907385605",
    "entityType": "Track",
    "nonce": "0x6363b3060a54e496774de02e98009e13026ef848c2c496966ce059a27171d0a2",
    "signature": "0x948f6b24b3d5dc45af577b17cad0fab3207a40db44db92224cf16f6a7cecf7f27c75591238cb8dbfc07aca56618080de5de86efc0a428fe3f2b148cd3c34a02a1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}