{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855370430",
    "entityType": "Track",
    "nonce": "0xfec1538c5d558a7d7d93a152e145b954be492210443e7f7af7c85fc589dd12b1",
    "signature": "0x9b2597da87a30c51cb9ef089ffcf228efa4f877a193041c3fe4f1a57ef5384b15c4a3e2dfba54edaac28e3c1acb5c75d914907e58bade4a3645d96a16247c91a1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}