{
  "manageEntity": {
    "action": "Save",
    "entityId": "1862568936",
    "entityType": "Track",
    "nonce": "0xa42d0c6583f29573e4a9b0b6957e23399433bba71b00a9ca0f62d5334185cbed",
    "signature": "0x421fc48e17ee939193177fcc4ee138abc491d7efcbe98fe6bffd4dc7c01c260e436e1f9f67d2c1d6aedde92164172d11668f5571de4b50cc5c0a0afc397c73ac1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}