{
  "manageEntity": {
    "action": "Save",
    "entityId": "766718",
    "entityType": "Track",
    "nonce": "0xe86b5c95be2528107b151a6b3cb009709b626a181985895c81e1cb416c01e4a1",
    "signature": "0x19c034882b7f486cd87ed4c0a331adccbc91b794f5563213d84b1474b7cc87d77262797449c7ba4d76f5eb3ee7f4d663f82267d019019a0619965166d8de0acc1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}