{
  "manageEntity": {
    "action": "Save",
    "entityId": "154422",
    "entityType": "Track",
    "nonce": "0xcd2f48e3326b9b66c779ad35b6864111e3a04ce95253a60f6cc3eab33dee4aee",
    "signature": "0x9689baf2bc58322ef73bd49407a1e5a1f07483ed5a43742141c6c71e9ea33cf0416388390c8648977e1a16d88cc839aaa0a158514db56d31c8bf365f301ea9a71b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}