{
  "manageEntity": {
    "action": "Save",
    "entityId": "353620351",
    "entityType": "Track",
    "nonce": "0xfb8e3ef5eda0efba8229dacd99df5bc4290e1c6042abef77695369feb51ccb78",
    "signature": "0x9a40ddd387b204d27eb6221bbb58befc4dd6f494e0465ee341816283558465f6413dcc4f05f06854d86277b3bf3e15f1c36addd90c932fe50a9b61c0970c9e5f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}