{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454229249",
    "entityType": "Track",
    "nonce": "0x9baaa4486211ac48ac84e224346c432b7cc60ecb1aa0fe916c2040ed816e9284",
    "signature": "0x33554232b6a6ed5f0235a8020c762599b1430f0d02bd48fb40896e42c85b8f30166f2b32b7c364a6804acac268abead09f407e74df25321475bc8a26bdeb8bf21b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}