{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346549451",
    "entityType": "Track",
    "nonce": "0x7d62b07405677f624178ca104176fce09aa6aff7287d9d976ecb924b1ef2504a",
    "signature": "0x132ae51a9107b494acbc3dd93c421df49fe18be5237ec3a6e3833f8b02bc644971ab3d983f2ec6ea3b96bcc7d25510b0380cf73a57d6ef36f7871b5c5702297b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}