{
  "manageEntity": {
    "action": "Save",
    "entityId": "984578",
    "entityType": "Track",
    "nonce": "0x30cab6d250b556ed5821601c95c8c84d7588fc3ec4184069d4040e8172600906",
    "signature": "0x7a99a4f070fabdc9a13c6c1500bdb6e90d34c95389d5833d6263dc15da4a6bf73554e47dc75a52f18bc8549496738418b4b047a91d4562f7ee5ac1704c4881ca1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}