{
  "manageEntity": {
    "action": "Save",
    "entityId": "627456207",
    "entityType": "Track",
    "nonce": "0xdad48d6058aca7547a0654499255bbddc22ddd8eba587089459de3e32fc9c68e",
    "signature": "0xfa8194cc83ef4300157d452aab222bec9198abf8eab588536481c1d51d11ca207973083bf38a5ee58b6fa7fce514d18713faa25101227065f54362bc28025c801c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}