{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788716084",
    "entityType": "Track",
    "nonce": "0x90a45b70ac5eafc0c764e9cb06aff5cd3d2dd4079bcef098a4d7bdcd8a1f4d76",
    "signature": "0xc36f16390c46388676a70888e9061892629387822a8af900efefce761d7099c914455056b5e70de5f6539c3bd0b54a7acd38b4df10a5edd8a08fe7b35264e5f81c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}