{
  "manageEntity": {
    "action": "Save",
    "entityId": "1084816469",
    "entityType": "Track",
    "nonce": "0xc7fddcafa5da49b6aace42d36f406d8d8fb09d05c323bea154823d2c5992c277",
    "signature": "0xc24b9dcbb81cc8ae1a6b6433d810b9deb06a483769b49a67705a5fd0f29013215a07517714757b5713ef2d5364e95ca60e97e8e9751043ea62ebbf5812cdba111b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}