{
  "manageEntity": {
    "action": "Save",
    "entityId": "1023755911",
    "entityType": "Track",
    "nonce": "0xfc206951521e79e1f1c6c71d6288054668f5b6c6053109fd1cc138879aa8516b",
    "signature": "0x8db7ec15164b1766dbd77b69edd9f7b4720224accb83c34486459248192c0cc64271b7c08c72d15a8b6f5595f18c4b84d78201a03fa7d0688fceb3ee81b975881c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}