{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016672155",
    "entityType": "Track",
    "nonce": "0x9dad382b8ec5afdf0d53d9076723de08df0d243d2e7bc46b1e7f2fc853afe3ed",
    "signature": "0x4351c935dfcb93d1bb030f721eb1dbbb9ab05b3da0d194a80b9b53cecf19322d434113011087a4662ad9f2cc7332a71d95d046cdef60cfa83ed5cd4c9b159a741b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}