{
  "manageEntity": {
    "action": "Save",
    "entityId": "875323663",
    "entityType": "Track",
    "nonce": "0xbc13bb60157587354e3ad93083947fb5aea98d3b144a8a90a86bd9ab560b932f",
    "signature": "0x2c86fb583c25a6bd7693b701dee92e6c6bff50b66d239ae017413369a5fd61235045d621053a558baf445f3959c5c4c4363a8ef60d98a81e5d6c07160c6f50821b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}