{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012079",
    "entityType": "Track",
    "nonce": "0xb7338ae74c61cf0b3d68dcff23df241d9c2420c0523d348e8df7ac928cb1c51b",
    "signature": "0x4d0ebf0ec2207f9c26977747c543897e2eb951fa3c3b41914f5d85deae7b5535779863586e5133e4b7c997d19d94aa50e35e28f4ff28bdabda1da61050f4c0111c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}