{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046315",
    "entityType": "Track",
    "nonce": "0x6324946b68ece501a9da6c1bd85fd301b3ec6925879db972cbba8493dfa96148",
    "signature": "0xfaf8c9ae94d924071778ea1c88972ab2ac1697dd63c59fe503d16bb487a9a4bd3e1186fa531d1b133df0ed6699693b608b4fe3df36d5309c6f199fd8a7f4f7fb1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}