{
  "manageEntity": {
    "action": "Save",
    "entityId": "1612918640",
    "entityType": "Track",
    "nonce": "0xa422c48fdc0e900514c2116057339d3bcbe24d567f5c2aa6809042a0e9a0dbdb",
    "signature": "0xaffad86fdd8a4c4f560b9028570638c3ad017ac74185117d4f9b5c0b6863fcaf6f695c4ad01be5e5f5c20f884a9e2a084bf80e789fe00751bcfa0969f699b7c21b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}