{
  "manageEntity": {
    "action": "Save",
    "entityId": "567073056",
    "entityType": "Track",
    "nonce": "0x418c8be53e3dbfc859823c55a9c78354b31787b979ff60a7e1276fea134fc9a8",
    "signature": "0xeb08eaa5995b4a1ea91e730d51e07e1b3086e066793e85ede9d1ffde76b63f2617af914e5a416c2f8949d0d593fa556ba265387ae77fb4e25a6748e0286740e11c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}