{
  "manageEntity": {
    "action": "Save",
    "entityId": "766387609",
    "entityType": "Track",
    "nonce": "0xe0fcfad67bc614e2e046b72dc48aa5c25a7213ce346805f4cadabad0860a1f51",
    "signature": "0xf627f371c46c997e8866f0cc10ed38135658ffeb1ee857dc9f431219ea5fe7ce42747ac73ab76565f056ffc8b41d46bbd7e36d218dd030b1bae39013db64ca901b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}