{
  "manageEntity": {
    "action": "Save",
    "entityId": "1059460",
    "entityType": "Track",
    "nonce": "0xbbf94d576629a7958221f706b386b06bb2f91525e77b95a96740ce24e12a35d6",
    "signature": "0x1af4f58ffb939f08edc5bfb10b71307a67a4d19398078a58c974c4bf39a0124c6237af88960d5982266e2213fd254625163f8a3e4be2a89519cd03fec020caa11c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}