{
  "manageEntity": {
    "action": "Save",
    "entityId": "73905521",
    "entityType": "Track",
    "nonce": "0x0ceb21776948a1d22d4de40c40737930162615475c0d2e6ce5797a6bdde64a56",
    "signature": "0xbc7512fe86b2b87c451575dda559318d56ac7d34f73c290fa36d39b3e0c8e6442515cd158bd9cb71efa0ed94132a797325a9d47f53050fb9c4eab142282cbfff1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}