{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102779211",
    "entityType": "Track",
    "nonce": "0x1d774d7f852f8d200907ecb8319791db328ba0e1def11070664e76b6e73549f5",
    "signature": "0x2677fb379594bb3d94ea2851022c2021d31e5922391fa23b5a1183ba970eab5517dc74e2678fd0eef89b5c5a9b78a0661ed77d33991f919aa59a2d139e57ba981c",
    "signer": "0x6802Fe39C5FA9f99ac1Aa32F164982185A3E70ea",
    "userId": "152482938"
  }
}