{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103499451",
    "entityType": "Track",
    "nonce": "0x92f82190989c7bad6775d715389573f46ee9b07c3f5170d43c88543a971f0bc3",
    "signature": "0xbb7b885e085b76b68235593379b3beeaddfaff654e44904f5956992ef907d4d716083c2015723bc67c23f167ba90df849c1846ff72fee19643efbd44df223bf71b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}