{
  "manageEntity": {
    "action": "Save",
    "entityId": "52598",
    "entityType": "Track",
    "nonce": "0xe80ca9b94cf429fcc322c6c2c7e6c12fb0c304bb8433c9e2bc77580f7097e735",
    "signature": "0xbf5eea3b58a03a51123daae641e2bba3a1a33f12985ea68a96e4ec1b7e5663255655177abf0abc1989a5c9646109a83b21a6214b2dd7e530b306c37c8fb8673e1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}