{
  "manageEntity": {
    "action": "Save",
    "entityId": "534477386",
    "entityType": "Track",
    "nonce": "0x7d9da39e76d9e6fdb14d7343822bc7213d5334a068cd4e9180dce471e562ac0b",
    "signature": "0xb8a5f918e78663c2ee5c2f1d597f397e32781eccb9eb15b1e462ef65548407c63d2c2fc012f0ca4426f7b8058206437a6306a7bdfcaa951db528b035887f59b11b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}