{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350826306",
    "entityType": "Track",
    "nonce": "0xab496364816f6ed9277704cc4c1172e4167f7d6957dff7853ba7ff662087c13c",
    "signature": "0x4281a1b1cf43bdc6648ee0f4b9a9021e440f7c976e4ca753b683e63e57dcea5f46b96c02b15d97c026f1dca1a1dee0b119c9c205ee6c973d1ffae04d05c4da5c1b",
    "signer": "0x9749228070Ea63D35C2Aa8F65344ced72153Badf",
    "userId": "354947534"
  }
}