{
  "manageEntity": {
    "action": "Save",
    "entityId": "111231543",
    "entityType": "Track",
    "nonce": "0xdf4ac370988b94ec41b2bb50dca1b9f30aa4f78444176cbbcbd830979724a79a",
    "signature": "0x11bada12421a0ba9b19a1e3bc14e54c57294ebcc3c9dc06a5822fc1ef21bbc9c4aab53c6105e038075f456d290aa00c6f2a88796d7fca36e5ece2d3200b1395d1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}