{
  "manageEntity": {
    "action": "Save",
    "entityId": "335304978",
    "entityType": "Track",
    "nonce": "0xd50d175d35c917d75a54c6181984e1af3bbbf46354804bdc29cb4563cf008cd4",
    "signature": "0xf0a57e70c7f0a70ce53a75b4f191add6e658f9ebf4d03fa4aab4410be2e697277084acfd8fc309e63059a7ecea6afe14eff693049e6540c6a98124f4136e1efe1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}