{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136444479",
    "entityType": "Track",
    "nonce": "0x405277f40d85293be161f0c851d603ddcb267dc03eab6d524febb1114516178d",
    "signature": "0x0c07fa79ddb03331d3acd443a2bd2aa27b95ec67b11e1ebce1414f4a794527de524eedf02a1966aa091951a66789c74b4dc1d6973907e411c265aa518eb269b81b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}