{
  "manageEntity": {
    "action": "Save",
    "entityId": "395025926",
    "entityType": "Track",
    "nonce": "0x9e5968c2025a28c2d4b5c076219cf8281840d0d72a18f50bf054375b1c64be50",
    "signature": "0x31c36547da5ac5a15e73d270eb6e03b717d0fc365e1c5e6b4e8153031f5280484806199c70fc8b58d5b086d7ee71e79f85c67ffa1dfc1e03ae99907d8faf4ff61b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}