{
  "manageEntity": {
    "action": "Save",
    "entityId": "876811609",
    "entityType": "Track",
    "nonce": "0x0615d147f7d974c74c27dd367d10cbc3af4a2ed27f69022bd790e055196296f2",
    "signature": "0x203e74869ae93f6e8be244f03250dafc6759eb9291840b87c9fed965969053636018a02b5fe422f373eb49c4918be864ecbc57aad97a68db1dd9b91c76b03b2c1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}