{
  "manageEntity": {
    "action": "Save",
    "entityId": "320200316",
    "entityType": "Track",
    "nonce": "0x83e9d04f109306eca4be9ab4a871ab0341bb33c728977851db23ab037c61b198",
    "signature": "0xc7d062b23fc65213280b985e6f04f681ca4eff9706e230b920bdfed48abfc94a33fe2a5d64fc9a69dfdb88c811274dedaf4a9a6a6b5a0e793d26ebc89d45fba61b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}