{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735382615",
    "entityType": "Track",
    "nonce": "0x6a6d6702e9d63f3d270f676e87e8a9bbc5a54dfe87608c78416e1a9fddb47d06",
    "signature": "0x58add71e9498f3c44019b4851b2a2ff473cff0f4cd2d1f6fb16c7cb46550b90e28e3ebb2f8d012e348bb902ce2b79138e5ad8016a330bc8baebf19795f68053e1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}