{
  "manageEntity": {
    "action": "Save",
    "entityId": "335301",
    "entityType": "Track",
    "nonce": "0xee9ec67ff127602e4cd71391b89498486766d64718e754e924479b979ce21248",
    "signature": "0x5fee7e767585c3f9ae1c2eb14d91487c83541a6e0e5d3be6f195321b3f4637d501b259da99bcbe0aaa48d74c583ec9d0de1a4d207ae047ff36f84c656efc6c261b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}