{
  "manageEntity": {
    "action": "Save",
    "entityId": "957391827",
    "entityType": "Track",
    "nonce": "0x55e00170ff4ff58ca6175e1ab2b0574b9e171b1f6c8538f487d1e8262e5cb083",
    "signature": "0x144ac3a2b66daaf2081158990d44ad547f3e6c307bb52eb21ad183fe5c72ee8152c8a5f37d25b8c064e450bdf1c231960908b11fbde41ef14036bb529af71f721c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}