{
  "manageEntity": {
    "action": "Save",
    "entityId": "270290366",
    "entityType": "Track",
    "nonce": "0xcf7cde3f5afb43683fc183fae7532a67dd1b020410825cb599bba3c0d6a8b306",
    "signature": "0x9508dd8c5146060e059c951db55db245068a6ea1d3976ad73d856308b1d9ae125f9de519853a2af56813c39292829311063f8b90976732799f0de812118fcd311c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}