{
  "manageEntity": {
    "action": "Save",
    "entityId": "2002992268",
    "entityType": "Track",
    "nonce": "0x102d7ed3ef512e18cc793ccdd8407fd8e433b947b0fd86a02f409cad075108fc",
    "signature": "0x3911771b6333fb0f7d6e7dac8495e79437d58d62b7d09be5e09b548c9700d7ff49751c65186da511e4b8deaeebda7a55845dfa550332ffbc1518ef15209ec01f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}