{
  "manageEntity": {
    "action": "Save",
    "entityId": "118551911",
    "entityType": "Track",
    "nonce": "0xc4f5fe854c18b8c40622cfcc609366822a27ca8a514395049a59259f79ef7e5f",
    "signature": "0xa3d134022b0e5253cc801253d5685aa1101b63cbd88f0630c2cb2c217b6abbdd3fca7a39144eaaaae3692111b7c3560020b5317d33844c1c199612eea17408c81b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}