{
  "manageEntity": {
    "action": "Save",
    "entityId": "429217425",
    "entityType": "Track",
    "nonce": "0xabb9360c4fa85c91fc104f8327137cae762c9a0dd87985a6bd45956eda7d8a3b",
    "signature": "0x701231eee8491f7c8496df58faa2927e5e041ccc79b14ba3f1c08673d312169864f11e35c04dc6176e48939ef9ccce0057852e2f07a37e7f63226e6dcfb5ecd41b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}