{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769134317",
    "entityType": "Track",
    "nonce": "0xc7659911b2c2c082a78cef3c2f2611182054080e97b0cd5239372364dc46da20",
    "signature": "0x1fdb27f95f51ebd04c8d17cd033ce31a6e24967b21ffdb37650b5ff6083e54653c0121f07a2c071e922bcca5893d07e612d0047c0320572b512f7f20952f417a1c",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}