{
  "manageEntity": {
    "action": "Save",
    "entityId": "943380",
    "entityType": "Track",
    "nonce": "0x41b0f15d16e55d967927ff66f7445000e560f264f93ce73f65f959e5b32ab222",
    "signature": "0xacc373c5755f11f3d495b2899cdc4c862017b74abb87b72ffb877b262ac02b0322fb23b4f29d86c12e2de67d153e353379ae45eea0dc0814892ac0a57fbcedca1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}