{
  "manageEntity": {
    "action": "Save",
    "entityId": "1297149400",
    "entityType": "Track",
    "nonce": "0x5faf60a5d44133e6eb77eddd05fbbd1ec884cf9481a22fe8679b034a32f8a6c3",
    "signature": "0x07929b6ef4ac32b5841c388346ebd4549a041513ce3fb59791dcfeda352416873ccfc8f8e423075a296104b9ba38f4d936a04746d195666984635e52671e41841b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}