{
  "manageEntity": {
    "action": "Save",
    "entityId": "1532475953",
    "entityType": "Track",
    "nonce": "0x1864058f2c48c2b5c3ee287e9c4149c841eca90a0a803120ee708f02fcdfaeac",
    "signature": "0x16210bfc5f5d298e53fedb4014a2b627d40848f03971a054cfb72c42c63d5d2872836ef7e05a0d8a5738e38b9082a1d1726a1d3216c4c04ceadca2724d96d97f1c",
    "signer": "0xc6A421843C183591853a72f2afe7AF4CcFbc4FA1",
    "userId": "344756485"
  }
}