{
  "manageEntity": {
    "action": "Save",
    "entityId": "1877941362",
    "entityType": "Track",
    "nonce": "0xe419877ed35d5fc7ce57ad27d3247194147000239d5c6cd26347595018a17144",
    "signature": "0x92cd3836b655b656017674a13560b1b003aa0d2e9cd41f3634a1954b73b707af016d67377d70509a77c5e6fc238638a9a6e561f4e27485d5679e6aa08c7d1d801c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}