{
  "manageEntity": {
    "action": "Save",
    "entityId": "608761457",
    "entityType": "Track",
    "nonce": "0x5506ee1c06a0a75dac78fbee1ec08b6149759ac97349350be91a31e1d557d538",
    "signature": "0x6712b05f4636932dd68b66e9a613757463c088827ea285f7303b1af69f6a072c1e1a0c69c48549d3ef4a2b80ca1d8239cf6bb1ae5f21143370e5b63488df29051c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}