{
  "manageEntity": {
    "action": "Save",
    "entityId": "41064444",
    "entityType": "Track",
    "nonce": "0x448d59ff18bfb1b247a74c96a6f89e484828e50fc73e3686288a5e20a5aa7d4f",
    "signature": "0x4ef65b47d997f8d4a5b6a832b812773d2e2bdd7d765ecb88d0f60358363ad4f54d6010d2faad3e90a113648598cae0cd64e131574cd21627f4c7d994b7d0cc0a1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}