{
  "manageEntity": {
    "action": "Save",
    "entityId": "596466047",
    "entityType": "Track",
    "nonce": "0x37bee8a7e869845f408ed95bdb047fd9316b671842ea1de8ac5e76d84e31206e",
    "signature": "0xca929c2709e2ed3cc81df4f94c55c2a962cdf838808c74df65a6ffe05b9bd0975ffd5b845075baa04878ad32d6ef08c142f2de9610a9ef6a2b92f0e3730d07251b",
    "signer": "0x292eF57C1FAAc86008ab58D5116e0ba424C9189b",
    "userId": "721084704"
  }
}