{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768744425",
    "entityType": "Track",
    "nonce": "0xcce47b566964a5753332a889d7735200593045615e1ebe17b3a17c12e23824f9",
    "signature": "0x4344071fa6dc85897c91206a353904895a00520426de94b3b4d83baf0a77389e4a6fab79d7d5e36ede826c2c76f7c8438bfe9c336c3cedf38c1a44d9a41eaff71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}