{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037375467",
    "entityType": "Track",
    "nonce": "0xd4b72b6e98bc39deb96c635069af193dc268415732be63b8bda3433a349f80d0",
    "signature": "0xac2f7a81d7d4d6c868c7d194f0dfb34978d5b67dab3b7018fbd4dedb95f9b5f675d3869b67652cd91f3da1b7e4e9fd1f6250a736ebae27de3d74ecc0720461cf1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}