{
  "manageEntity": {
    "action": "Save",
    "entityId": "564469502",
    "entityType": "Track",
    "nonce": "0xe770dfb60fc82df3795d3b32d0798d1440ff040707891691fe9c9510c3c0127f",
    "signature": "0xee13690c7a270cf8902e0c93db59dfd37d9b26b877e7dd2c47c08f85a5315cb97f5b2f0c11fce52a76b0b001c7e77a5a64ff3fb1228915e389826991a464967f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}