{
  "manageEntity": {
    "action": "Save",
    "entityId": "1118765390",
    "entityType": "Track",
    "nonce": "0xa4234d703c2c4b8933d9d88f91dc52c3aa184c047c635160370c53d55d2d5e1d",
    "signature": "0xb4623bc46bfdd70f2d54e115d9bf35a8a9ff9079c7554a44ed25ce691c6f5ad707823cbc586e969ac464b94767d2d0a168d8a3a47276829263fe77cc98896b071b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}