{
  "manageEntity": {
    "action": "Save",
    "entityId": "900055682",
    "entityType": "Track",
    "nonce": "0xe242490b8ea688811fd149cab55120324ea49f34c752c3099e3a433011c94af7",
    "signature": "0x6e0f3a03a2f4c8944e5da9dced6f569e3cad3134795d97c1f86fd8f889196ddc425abe2e6dfa3b2188fe92fb2dbc89396de3a3626b78da2efe26bd97dcf07c5d1c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}