{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942370312",
    "entityType": "Track",
    "nonce": "0x9e6846657e7a6795e9d91abaea2ff9d08d22915cf0ca413b4cebe427c3e6486c",
    "signature": "0xcdb62dc97bcf8e4d6b90144f1c6ff7d8d30ae7fccd0fcdd368806766ed6a2c94239b7abe22d14e239838f60a58c2b06f5edd9d86ba30ac2ec86c60f6cd40ecd01b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}