{
  "manageEntity": {
    "action": "Save",
    "entityId": "1933607948",
    "entityType": "Track",
    "nonce": "0x4f290a64ec38a9c0f7830b8704047f5ee0546feee7108385428ab70e5b59d193",
    "signature": "0xa1974f8dc3ddd8456149ee49585fe4e98ee9a4648f70104ffa6b4dfc5d51fcf06dd02c3238583c9762d0189ebd3420841e0909da6ac1845ed34827dc15ed18cd1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}