{
  "manageEntity": {
    "action": "Save",
    "entityId": "1001187396",
    "entityType": "Track",
    "nonce": "0xf60147d7126cf5ea40931ccb68d3048b73a72d8cf66f6ad00b5f61efbd0cc1cd",
    "signature": "0xe1909f56d7779ad17c15f79ef266daf91bf5e669b90a94e05968d90923957e07576d4440e59d08c0bfe7137163d29d81b6745a4b0164ad14fcf4508ff87857b51b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}