{
  "manageEntity": {
    "action": "Save",
    "entityId": "49680",
    "entityType": "Track",
    "nonce": "0x67c1eac08451acdcb2f5763beff88f0d7c9e6c225a21db9bd2b9be741aecb787",
    "signature": "0xca2d7947cbfb6b3ee6d10a5f099fcf6a1e11f40d0cdd6e60e073893c5d85c94f6df82bf856e1de80f965d543a75926f32bb61311928083076a47cdb576e063dc1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}