{
  "manageEntity": {
    "action": "Save",
    "entityId": "459661",
    "entityType": "Track",
    "nonce": "0xe1df460e6ec81a24137c6e468c53d7406abcf7ff6b0856edf829cc85a195fa80",
    "signature": "0xf8e8660bf9997ae2974cc26b5b9b440e172c1b133e04ef8d7ac0f0e4e61b1ec74e43c468d0c94fdfae57c3c899359e9616b670bf9831fcca62d155a90de85bc11b",
    "signer": "0x44577d90A171E208f723dEEa39019067c9Dd87E8",
    "userId": "853591809"
  }
}