{
  "manageEntity": {
    "action": "Save",
    "entityId": "2083446224",
    "entityType": "Track",
    "nonce": "0x855e5ea3ee19e84dae6a545d519ab91974fc72c252e59d385c25d558bbd851f0",
    "signature": "0x2455d86d38f1f39eff2bb8030cb0e7d4746b662b84ebd5b01cee2ff340bae4ff1a8b787007cb621dee3d1a8a3d0616672f0a86c6f82b18976f2b58cfcbbf540c1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}