{
  "manageEntity": {
    "action": "Save",
    "entityId": "1428400052",
    "entityType": "Track",
    "nonce": "0x35c322f0a56b86b2074869e65fd5ae0a0ec9f68ef28642a8f7085a1aa1678116",
    "signature": "0xe03b62fb5013771d131f32568f340b74f5d1349ccbccde2e9a72ec5fa92570542928dc16365805422979ba099bd9d449a4b867521930ee2ef22bb722affc85c11b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}