{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770111531",
    "entityType": "Track",
    "nonce": "0x1a1fbbef2a9afea3e6aeec528ac3aefcc5b968b9a9d2f9ef5e1fdd77377f3a8f",
    "signature": "0x7caf23cecd6c770e0904c3c313bf846dab89db42b74acb6b9e3d0b06667b86d638ff08d966f22133d3e954e115e382aba3f5b77ba00067d2a3693f1cb98c79831c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}