{
  "manageEntity": {
    "action": "Save",
    "entityId": "1818501008",
    "entityType": "Track",
    "nonce": "0xf1d5e60793c90c48940967a67cdffc7c063858a520e65c0778a95d5b779c7d79",
    "signature": "0x80b946165e33fe7b90ceab6726896b873d25f9013362626c4b4d602557a187c10899cc6ba2cc5a90a2aeb11e340ce8fee9d24c48f62930cf7e29d5b83631cec91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}