{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709070740",
    "entityType": "Track",
    "nonce": "0xb96b114c1977af6555c2816c405e5c7dc67c120bf1a5373fbca159bc0276187f",
    "signature": "0xe1a91db88c11558d614995a2106b38f6da5566f4385358199361f1efda14daa45e42bed6bf1ae9b9aaf8d94b8e4de19c8d4b808da78bdf680ba4080e74c22b5d1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}