{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835846624",
    "entityType": "Track",
    "nonce": "0x542beda40b76e5f723edb913948b2757ff17690c0225dc46bc1ec1eb2ba712cd",
    "signature": "0x28bc46e3345b4a04a6575cd2476e3a3b29b4e90af2076693c05f773383d8bd00396707de72978294153881883d62938de17fd71338c81615d4396d65e0162bcd1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}