{
  "manageEntity": {
    "action": "Save",
    "entityId": "33698547",
    "entityType": "Track",
    "nonce": "0x0e4da7e3523dc4fd60a6e4e239b4d763567a2ab861371f6988e8cc660bb5c2f0",
    "signature": "0xfa0707adee35817257d7a4ab26314cf0999ee1c6e4bc82bab77958b058269aff3dd8915860471315670df3ce97d5ecd42b0410cae29d934d67681525607986351c",
    "signer": "0x50030fbe6dD7CF39a4Bf73736736A06Ee3820C31",
    "userId": "339715673"
  }
}