{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810762569",
    "entityType": "Track",
    "nonce": "0xfc8eee83f51b4c21ec50ea45a58865d8a2d37ac8e0081dfbf2abd5525297fcee",
    "signature": "0x78de9f3e870296d19a35737ae3bb133065fdad58737a43b85dfdd8dd3cf0e67a0807586ff65eec7e286e0816845e77ccf24e65afbede3af353f86fac27018d671b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}