{
  "manageEntity": {
    "action": "Save",
    "entityId": "1280839687",
    "entityType": "Track",
    "nonce": "0x26a92e036523ea03a815d7cef5dfc433fdf93758053a5a679b7cb0a2e08c73fc",
    "signature": "0x9398b2af10c15ca8a38cdbc120ebace036f0eb220d247337fcb001a436c61f73760cb27bc66a3a557ee93d751b61c1666b9631cdbf6c692fde7abc7bcf85401a1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}