{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635225771",
    "entityType": "Track",
    "nonce": "0x8523750264143d4c0eafb22f4bcdf751d3ba747b846c082953d35c280664ef7d",
    "signature": "0xd40b0aee366518f28e0ec0141ae2ee039e4a931b4b595ab87db5877d6efd0cd4591359c29649418978ea058a0205c3c85adf47aa752202ad1d91680270d487a21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}