{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468386756",
    "entityType": "Track",
    "nonce": "0xb39675959d4f19d7a48566899c4a34ca3d1f840d1b81b664366afe00e09b2bc7",
    "signature": "0xaf91f92a0f609b6ef4f9789e0f5673c5901ca446d2ab6cdcde9fc03a1a3895c32eba1125765be457b4893226146cad6c00cd849fea55b35de1980e5705ad3c711b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}