{
  "manageEntity": {
    "action": "Save",
    "entityId": "1950865395",
    "entityType": "Track",
    "nonce": "0x37536f123c0a9a250bb357e46aa96ba3637bd42ed135f77f46723404755f6737",
    "signature": "0x88e4e108121e48064d224723784f7eebcad6d86b9bd624d44954d539a7605e1d075d9796963b016d1af01dcebccf4588e766adf931b2dbc92c36b66052c92d321b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}