{
  "manageEntity": {
    "action": "Save",
    "entityId": "1630205079",
    "entityType": "Track",
    "nonce": "0xa05323fe8d2b7061d49765b9a58a9e74759faebf194e924eb692efad0eb6d7aa",
    "signature": "0x8a287517476114fa8dd0fcbcbd693556a593925dc2a7250e7bb96164767358e430f24a2b74484875606bb1747ab83c1b56a0ff36394f4ad160f548c15eec13641c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}