{
  "manageEntity": {
    "action": "Save",
    "entityId": "48433635",
    "entityType": "Track",
    "nonce": "0x1f977ea1cacf8327b9ece2511ee6726bc48dfc0490f1fdca4737be1b4eaf18fc",
    "signature": "0x06c1666d332dcbe93d0733edb51319153b03a6864a3dbf60a136b5fd1eddedf610557f33b850c4515feb3e6d870007a1c2b339a1343194d31629c717355924ff1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}