{
  "manageEntity": {
    "action": "Save",
    "entityId": "1380052719",
    "entityType": "Track",
    "nonce": "0x277596b606a9759b7a7968beb6b5e543126ffbfb9898077d8ea778573b6e0a2b",
    "signature": "0xb328d8eff3720fcfc5f576b805eee002e4194c01c36632180b5d7eb606e8cf464aaca2822e71cc5a10ab7012d1c1b5c2c83c4d699be58f1a6f9be7b852f05ff91c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}