{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120540",
    "entityType": "Track",
    "nonce": "0xdef1d7afeb072207334e2e45f4b2994e557ba0ec01a6b743bc573000fb35ffbd",
    "signature": "0x8d71a36f72542f4314839fff0483548bcd387b36369c7ea73ee87de0b10323334db50fe161ad6ca3716f02c11ce2026a353500f13aa4c262d63f61b1a09b967f1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}