{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045801699",
    "entityType": "Track",
    "nonce": "0xc29ea4176f5c2eb24cd56fa72788e6c1098e4abbd4d4d26c18a0cdecb771af73",
    "signature": "0x4ce6b3fffb4184925ae8f4ca1af1a68cfe7587743f8685145f6836b4ad20c8b9656768280582886b49162cc53405dc7755587aac7d93975f9d6a912b68131f961c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}