{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278096594",
    "entityType": "Track",
    "nonce": "0xf624de2fe99a992d480921ca61498ad3e262489c031d2875a0f274f9f59ff87d",
    "signature": "0x49c6b5ca9a1b1c21d514fd18d949ebf69719cf10efeed5aff92831379a088a433e30d8d52355ee1308f4280e670c89e306a381fe4a6300fd904f3c504becfa111c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}