{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708207266",
    "entityType": "Track",
    "nonce": "0x5c7936fbb37e99d3c4b1883f19d8072e1bed42edf0c81e77a8ad152e47558d8b",
    "signature": "0xf42497eb72de516d6ace885183bd69d415784771ddf60576b21e693e5262705e200f4a3748efda3fdd5d25d996b74332bea21d2fafe11fc52c01a81caddcb93b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}