{
  "manageEntity": {
    "action": "Save",
    "entityId": "847943671",
    "entityType": "Track",
    "nonce": "0xaa05c142692cc7d2d38a43c95f3ea30d80f75525f44b75da858c5fff455f0a22",
    "signature": "0xf75fd03ac88837611b31c913b4b98f73e5aa11c09966d292280fd4b370004ded698248440eb7e3132fe2fab93d752dbecd187380e42f6fc554f72b98a61c41a31b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}