{
  "manageEntity": {
    "action": "Save",
    "entityId": "364396",
    "entityType": "Track",
    "nonce": "0x9fd9f630a040a3c88503cb94f181dd187e7c8a25f0bab303aa6babd8307de6b3",
    "signature": "0x5c3b2e22693dff0099188282786cb55a2ac08f65af316665f2d97866c0fd7d8e6c3500b1b34de38c3b2212c9ba65d63f05f29cbbcc310c23c220615e6d0d6a9d1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}