{
  "manageEntity": {
    "action": "Save",
    "entityId": "984192",
    "entityType": "Track",
    "nonce": "0x70a5e30ad2d41742a986b97e01f9cccc3b813b56952c6b6542efe837fbeacb52",
    "signature": "0xa90587609adb6629f60865b5493686bdffd2ad95a862a36e2f3d92873688b26b7d668ddf8d84b44466dd784a864440f5b44cf519661b1c60777a89fedc7d728a1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}