{
  "manageEntity": {
    "action": "Save",
    "entityId": "50546066",
    "entityType": "Track",
    "nonce": "0xd0c95fe431ba27dea642eb1ecb01bd035b008bab969a47a9ee192e1615512543",
    "signature": "0xd659e20a104aaf10d1519d079e3a7c4ef6585d80528c5c527ddd8bda3e5a663c77b67978224a1f244ca34ce4dceca5a25b3fff8946fb0aec77c5e690069652ab1c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}