{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356178900",
    "entityType": "Track",
    "nonce": "0x488f9afa6eefc842e9d59ce3980ddd068cb49638104547bdfa510a7ac3b280fc",
    "signature": "0xf24a2bdb212fb4e9699f91bc2adc968f31151c763e19a9b5adbfde4402475f340a0802c757165a2ee5d1d19bfac018cd62c457a82def8364cff0d296dbf6d3161c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}