{
  "manageEntity": {
    "action": "Save",
    "entityId": "191061563",
    "entityType": "Track",
    "nonce": "0x6270e48066f92d50b702cbab50ff0db976eb89db1a9844a07c0528c40ae41e37",
    "signature": "0x4015be6d0e2d2e11abfe7c2652590049f22b58ab8c31a0aef937fa293d1b4b29612eddd8d3aca4d30ac3fd89795825532ba68e36793d9974a41a46f075382b1e1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}