{
  "manageEntity": {
    "action": "Save",
    "entityId": "828197700",
    "entityType": "Track",
    "nonce": "0x873f71a8591483637499f037316527f8e3977b52838db688f61fc6e5eb00a8b1",
    "signature": "0xe4b5b27d7fba37c366ed8bd22257791d4f0cc09ff15af2fb360a30e9fa9da8827cbd6264e99393ac2c1d320bf7669105c3bf4c81117abde1084197bb41b537e31b",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}