{
  "manageEntity": {
    "action": "Save",
    "entityId": "698122745",
    "entityType": "Track",
    "nonce": "0x26d3f7bbd53f4ec8f2c3bb1848769cec20942dbc3abd7713525118419054a413",
    "signature": "0x21ec5646a4486011bf66194b3281b2d1abe2594ea67ba25a3d5013f4d065111829702d2d98188c25e385657e8c92748ed45d3ac4248bc8a3a80ae8cb9955fefc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}