{
  "manageEntity": {
    "action": "Save",
    "entityId": "963209171",
    "entityType": "Track",
    "nonce": "0x89283ae3bd8ed1622e238598bc0197938615ecde00c63a69109c4edb37f65c2b",
    "signature": "0xa1aa84aecfbd01c5ff2e50b6f65f9f7b43237ad97d332240f67a44788303fcc6268f079dece41f0767df6c93f3bc16ca621d4b49f55e155b4e0acef73aee0e6e1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}