{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888412755",
    "entityType": "Track",
    "nonce": "0xde7fb94b4af60fee4743208c2ce2fef0631b18094e7b7fc252a04e028f6c977f",
    "signature": "0x7d13bf5192b1837c56244aaeec43d820f8187d4a3e230ffa0a1e66c63e92975c7ea1f773527363423c1cd085bd6fdea55647dc7f0362e8e8bc6f5d55581a98281b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}