{
  "manageEntity": {
    "action": "Save",
    "entityId": "699087912",
    "entityType": "Track",
    "nonce": "0xce5248dc2935b738b94cb2e1c39bb4fc1b7d9385a9d64f0d84a256ef27896319",
    "signature": "0x857bcdc0263cceec6c0778d9349d77c6e870a6917488a83db113af8d75da57b9047bf5d00a322fd8683dbfbf28ac61a8a8e177166e27c432f827b03658ca8ce01b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}