{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078984989",
    "entityType": "Track",
    "nonce": "0x0d7639759abe89b9e528b9d6ee99e3ce70487d21117ab252433eadfe9c1636c3",
    "signature": "0x877542e4b159a98659bced2b344fc131ed6ad6761631e817fd3de8f4b7725a58613e542d936c85db3613c6795195767f63119ab6b21b7d47c9481908e7db45e51b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}