{
  "manageEntity": {
    "action": "Save",
    "entityId": "724253343",
    "entityType": "Track",
    "nonce": "0x4bf66847210569b6697390b32ee441fbe83f0a472b3d54b69140c9a05ee407da",
    "signature": "0xbd4ceb35b3b2cd50ebd1a607411b31fa982cad11aaa7f5607801936dcb2c97291c1ed84c1d23ea347fc65cf81c1a11c751104ead3f6ccd8cb8e53012ce33479e1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}