{
  "manageEntity": {
    "action": "Save",
    "entityId": "1543229609",
    "entityType": "Track",
    "nonce": "0x5651a0a1773eaa7b4964d01ce2ef566700bbf4eebcbfce24d05575a5a0e6aea4",
    "signature": "0x077d76dc1a69390502dc350d1f3effcb8abf8edb7c57edc367b0751ac3685fd145a74694ad10d9600f9725ed052f7a198daf05fa1b625c902917725de2e269b21c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}