{
  "manageEntity": {
    "action": "Save",
    "entityId": "586408",
    "entityType": "Track",
    "nonce": "0x6abb5b8c5bae151a96015d4c61b46c81889305e4c5f34f2876167c72f8d5d195",
    "signature": "0x8c16d70f0267256bde18d5bedf84dce97b85ed553f588d70f478a7448591f1c61d63204b4cc0a8d6d0e20b4f6f93534e817aeffbd3ab47abf466c0eeee81c5041b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}