{
  "manageEntity": {
    "action": "Save",
    "entityId": "240291",
    "entityType": "Track",
    "nonce": "0x019c336fd1fb959e36184da33250bcadd27e0120b958244fd0eb8e4261c9e027",
    "signature": "0x261081f837792eb9430cd07a951d4a7c7986aff42f08a16b9dde941dc7a41a4e7f568a0859e4e8b10cee76956b0a6e3667b7d41a3a9e02b92aaacf45a698fe931b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}