{
  "manageEntity": {
    "action": "Save",
    "entityId": "627616",
    "entityType": "Track",
    "nonce": "0xc3af57c5121b3240442c4b7c4b4f17062480fc66f716640224127c256a51c28f",
    "signature": "0xcd435c26975ca795e1dcc6721672bbd5363e82de4a6946cb7d0989ab9654d777559e82e5e358634300958ead64db0b9082a5aa6a37d43554b4085d2e1dbb6d7b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}