{
  "manageEntity": {
    "action": "Save",
    "entityId": "19104985",
    "entityType": "Track",
    "nonce": "0x5629cc08db4221ec06bc2b2574c8f4f7ef5b0613f817ba651b29221af0f867b6",
    "signature": "0x82ef90c5b345306dd58b3faa760ce3c23c841fe76cd7cdfceee2cf1221ccca414c54ddaf323b07cc9c7745b0883fe948363be4b38d35eb1ca17271ee446118af1c",
    "signer": "0x39b9f428c41489717f21E4BD8047647B53735281",
    "userId": "980027720"
  }
}