{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412086154",
    "entityType": "Track",
    "nonce": "0x4f78d0893c70d75713b78951d1dbfa3d5cf7abe30531de4390cbb3eeedb6d94b",
    "signature": "0x6f6d54868c7f612711db906489dd793bdb8ef4c9cb9867119fba6fbe42fd58335a6e46eaf54deeeedb5476f0d0cc1c56a015b07835ec0d8f971955f79d1fea221b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}