{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000087079",
    "entityType": "Track",
    "nonce": "0x0c31c0ea381c1e5b435dda67cba255cf209d50354f686bdde25cb4a7e53aae2a",
    "signature": "0x0db0e5ace52f72a5b75f43af293851b99a2e4713b442ffc92ab3c0ae0fa5abfe00fa0c06d6fb0078a0a30afddf46744e73b363b5513091fd36e26df38f7ed2af1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}