{
  "manageEntity": {
    "action": "Save",
    "entityId": "240291",
    "entityType": "Track",
    "nonce": "0x51a304b636f98618d93b1d9144d7d01486e515641cfb7ee0964bcb7437aae095",
    "signature": "0x7bb1fb683b974a0a6059cc6cfea117d6823cc6d857dd66fa8df92ff8a937424e1a1f8ed87d1259aca437319a21fcce545aa91044ee7e5a541c967449874646361b",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}