{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086925",
    "entityType": "Track",
    "nonce": "0x43ce7571f6bb29fbed757694577d42a40e672131a14b9ad36a5bd412388b0499",
    "signature": "0x01f681db03ff8d9dd62b9dc407aca4e787c0bb4aea6a850619aaf6aef42f8c6658d041dfe4637b8fa4517e545d2c1a24927ea6fcef12e225ef4be371c894bb1c1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}