{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089568",
    "entityType": "Track",
    "nonce": "0x8fc574834f9c238f6bccee10c10ce4e506964a35e4f03ca5fda7d42b48f05e1c",
    "signature": "0x1ff8fc5ea4b7ef587f6c39301dbfe00d020ba4b2b7d7f99a8f82b6ad2658f69e2c8d686b3434827b1afa46b63caeee947c0d21b36a77adad1402ab4eb74547361b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}