{
  "manageEntity": {
    "action": "Save",
    "entityId": "570519573",
    "entityType": "Track",
    "nonce": "0xff821d9faf29c2c3553ffb6ce868d42c954f90774bdb1c9ba48029d1c4a8a139",
    "signature": "0xae67ccc3bebfed3eedd951fbb26285d913afe922b6cc21d34492470b7224a4380acca1924f96b0bf2a0b8892e45dd89a8676718fd50bd252089a554f3e4b1f021b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}