{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375624787",
    "entityType": "Track",
    "nonce": "0x548266c1f38f9698809acf39fcdf05556906fde937cf66ad4794ee1c8debb63c",
    "signature": "0xda0c899bc46136d44ca0e7e2d0fefec25d848ae88bb773260f63960f249ff0ef44583ede58d0ca1ae2b3cde15a5937bebe02a1f518a94ee54954acb5328da33a1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}