{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544204144",
    "entityType": "Track",
    "nonce": "0x60ee276ad142882a0d4a01f780c592c90e5726fdc0f2cddde3b4d6e0eea3ecf8",
    "signature": "0x88c58ffa0a0a82df04fdf81bedc193dd503e91860e0b666777f37ef16ba9ecbb6db36d3dac022164f3de9698e82c335c774f33002d98883991773fc2cf40f6d31c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}