{
  "manageEntity": {
    "action": "Save",
    "entityId": "1363414685",
    "entityType": "Track",
    "nonce": "0x208a28d164cc212caa2f6aced3ac2bcf2a5618a1a5e0c0d0a3785fd72fcc8044",
    "signature": "0x15b148f8500fa00bae49efd949406464dcabd38d42ec25f37e9d5339265285ad7b43aaf2d2195aab528227c4b1520937cb7a9280d7775ae2c62e9ba61a3924f61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}