{
  "manageEntity": {
    "action": "Save",
    "entityId": "433867593",
    "entityType": "Track",
    "nonce": "0x9350535921e2c6877391f4bdeb2d16d37e97c1c2732864f97b5c7516696776ab",
    "signature": "0xd1a1e9d3ccf1c6473ceb2ee042367f9be166b27610b23f7c9e01ad13e11c76ff4fbe1289eec5ddf94e4554d5d2715614f372ac1b29878ea4a21da7a25e5ed4c71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}