{
  "manageEntity": {
    "action": "Save",
    "entityId": "673416",
    "entityType": "Track",
    "nonce": "0x762042a2a09ea84bf1e2f75b4c3f69aacebe3b2d824dacdd9966c023cb506a52",
    "signature": "0xd3de6fc28a69251f0ddf428f4192ccb8fa59b87f164955b2f4df873f08f989e708a774c7685b798ea8165cd2951863cba3735fcff55ab1e2a1658511761a6b0d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}