{
  "manageEntity": {
    "action": "Save",
    "entityId": "971645994",
    "entityType": "Track",
    "nonce": "0xd69fdf2ae87297fecddca21c3e6c7092f79986817cf711bcdc16e8bfc703f90b",
    "signature": "0x5b05e01381da8f9dca66a5bd17ac3db86337138ce14eb0da000600621d32f6572913579141ffcb7cf525ce5f222503befe7d1e9fc2eef0c6bd9c921001d771401b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}