{
  "manageEntity": {
    "action": "Save",
    "entityId": "1570267007",
    "entityType": "Track",
    "nonce": "0xbdf408aaaba9a0b977d05c115cd741506465c071c46dec1e188bd042e8015bfc",
    "signature": "0x31ccd8f3884be7f9ff346ad128abf75b8f1cd031840dbce98117fd9d44b6f212020a7c1a543e5d10676501b18a90e1b65fb00bbf9c91026c5aa6ad7724c8cc881c",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}