{
  "manageEntity": {
    "action": "Save",
    "entityId": "1470028878",
    "entityType": "Track",
    "nonce": "0xf4e6ac31ce0ddee11a52701bd5a20bccd49d934c2bc1f4af8bb88536a2635497",
    "signature": "0xd85fb61e083c5811fbe367d5fa8d79619a1894f4cbb549f028fe22ad5418bd7520c68f71a0154929dd2e08c36be231c8f13be46f138a3f19b8e91ee8774a1f8a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}